shitty grin

A smug or mischievous grin usually used after someone says or does something mischievous or sarcastic.

I knew he had done something just because of that shitty grin on his face

by brownbob September 1, 2010

shitty grin

an overly large, or irritatingly smug smile, showing an excessive pride in oneself or one's achievements

her husband was wearing a shitty grin, thinking he had won

by DTinLA May 10, 2011